Preparation and characterization of GG-licf3so3-DMSO gel polymer electrolyte for potential lithium-ion battery application

Che Daud, Nik Muhammad Azamuddin (2022) Preparation and characterization of GG-licf3so3-DMSO gel polymer electrolyte for potential lithium-ion battery application. [Project Paper] (Submitted)

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Abstract

Demand for lithium-ion battery (LIB) in electric vehicles and portable devices has increased rapidly over last 10 years. Electrolyte is one of an essential material in LIB that acts as a separator medium for ion conduction. Gel polymer electrolytes (GPEs) are now widely used as separating mediums in LIB with synthetic polymers being the based material. Adverse properties such as expensive and not ecological friendly lead to the used of biopolymer as based materials in polymer electrolytes for LIB applications. In this work, gellan gum (GG) biopolymer will be used as the base polymer to prepare GPEs. Lithium trisulflouromethane-sulfonate (LiCF3SO3) salt will be the charge supplier. Dimethyl sulfoxide (DMSO) acts as a plasticizer to keep the electrolyte in gel form. Two electrolyte system were formed which is LiCF3SO3- DMSO liquid electrolytes (system 1) and GG-LiCF3SO3-DMSO GPEs (system 2). Electrolyte with composition of 12.42 wt.% LiCF3SO3-87.58 wt.% DMSO (LN3 electrolyte) in system 1 revealed the highest room temperature conductivity (σrt) of (9.14±0.04) mS cm-1 . The highest σrt value obtained by the LN3 electrolyte is strongly influenced by the charge carrier concentration (n) relative to the mobility (μ). To form GPEs (system 2), GG was added into LN3 electrolyte since this sample composition gives highest σrt. Electrolyte of 2.00 wt.% GG-12.18 wt.% LiCF3SO3-85.82 wt.% DMSO (GN3 electrolyte) showed the highest σrt of 9.96 mS cm-1. The highest σrt value obtained by the GN3 electrolyte is strongly influenced by μ instead of n. The conductivity-temperature study showed that the increase in conductivity for the electrolyte in system 2 was controlled by an increase in n, not μ. Linear sweep voltammetry (LSV) for GN3 electrolyte showed high electrochemical stability up to 4.8 V. Cyclic voltammetry (CV) illustrated that the redox process in GN3 electrolyte is reversible. A LIB with GN3 electrolyte showed a good discharge performance up to 480 hours with an average voltage of 1.50 V discharged at current of 0.001 mA. Based on this work, it can be concluded that biopolymer GG-based GPEs have great potential for use in LIBs as a charge transport medium.

Item Type:	Project Paper
Faculty:	Fakulti Sains
Depositing User:	Ms. ROHANA ALIAS
Date Deposited:	05 Jun 2024 03:58
Last Modified:	05 Aug 2024 08:58
URI:	http://psaspb.upm.edu.my/id/eprint/1888

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